s5.grzcdn.com has no NS records.
NS records for this zone are defined at grzcdn.com.
NS records for this zone are defined at grzcdn.com.
Question and response
Question
dig s5.grzcdn.com. NS
Answer
The response has no answer records.
Authority
grzcdn.com. 1800 SOA luke.ns.cloudflare.com. dns.cloudflare.com. 2398238584 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0